Hi my 99 899cc sx seicento has covered 121k and has a noisy chain/guide, i have narrowed it down using screw drives as a source of hearing the noise and its coming from the drivers side sump side gringy chattery noise.
Has anybody any advise on replacing i,e ease and time and pics or guides, or shall i just leave it . thanks

with that mileage rather than just a chain replacement better off doing a full rebuild or a lower mileage engine fitted is probably the best option.

or just drive til it dies.